OK, this is going to sound weird, but I'm going to post my experience here. And it may sound stoopid, but...
I suffered for a long time from hand tingles, nothing too uncomfortable, but very annoying. One day I was watching a video on climbing and noticed how the riders held their hands on the hoods.I often had my hands "draped" over the hoods, thumb on one side rest of fingers on the other. Or I hekd on the the top of the bar in a more "relaxed" up right position.
The video these guys had there hands more wrapped around the horns and it put them in a more aero position, FOR ME, so far it's been a great improvement.
I never would of thought after 50 years of being on two wheels I would just now learn to how to hold on.